681527877366 has 64 divisors (see below), whose sum is σ = 1641601852416. Its totient is φ = 184411920000.

The previous prime is 681527877337. The next prime is 681527877469. The reversal of 681527877366 is 663778725186.

It is a junction number, because it is equal to n+sod(n) for n = 681527877297 and 681527877306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3395085 + ... + 3590216.

It is an arithmetic number, because the mean of its divisors is an integer number (25650028944).

Almost surely, 2^681527877366 is an apocalyptic number.

681527877366 is an abundant number, since it is smaller than the sum of its proper divisors (960073975050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681527877366 is a wasteful number, since it uses less digits than its factorization.

681527877366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985437.

The product of its digits is 142248960, while the sum is 66.

The spelling of 681527877366 in words is "six hundred eighty-one billion, five hundred twenty-seven million, eight hundred seventy-seven thousand, three hundred sixty-six".